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Dangi A, Qureshi T, Chinnathambi S, Kiran Marelli U. Macrocyclic peptides derived from AcPHF6* and AcPHF6 to selectively modulate the Tau aggregation. Bioorg Chem 2024; 151:107625. [PMID: 39013241 DOI: 10.1016/j.bioorg.2024.107625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 06/28/2024] [Accepted: 07/08/2024] [Indexed: 07/18/2024]
Abstract
Ten macrocyclic peptides, each comprising 14 amino acids, were designed and synthesized based on the Tau aggregation model hexapeptides AcPHF6* and AcPHF6. The design took into account the aggregation tendencies of each residue in AcPHF6* and AcPHF6, their aggregation models, while employing peptide-based structural design principles including N-methylation to promote turns and to block hydrogen bond propagation and elongation of the aggregation chain. NMR analysis supported that all these peptides adopted an antiparallel β-sheet conformation. Self-aggregation studies characterized the aggregation properties of these peptides, identifying two peptides with the highest (P3) and lowest (P8) aggregation tendencies. In cross-aggregation studies with the parent peptides AcPHF6* and AcPHF6, P3 and P8 were found to promote and reduce aggregation, respectively. Furthermore, P3 and P8 demonstrated an enhancement and diminution effect on the aggregation of K18wt, indicating their capacity to modulate aggregation even at the macromolecular level. Thus, the two simple peptides, P3 and P8 selectively exhibit pro- or anti-aggregation effects on PHF peptides and Tau. This study, has thus developed structurally well-defined non-complex peptides, derived from AcPHF6* and AcPHF6, to modulate Tau aggregation as desired, offering applications in Tau model studies and the development of Tau aggregation inhibitors or promoters.
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Affiliation(s)
- Abha Dangi
- Central NMR Facility, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, 411008 Pune, India; Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, 411008 Pune, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Sector 19, Kamla Nehru Nagar, Ghaziabad, UP, 201002, India
| | - Tazeen Qureshi
- Neurobiology Group, Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, 411008 Pune, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Sector 19, Kamla Nehru Nagar, Ghaziabad, UP, 201002, India
| | - Subashchandrabose Chinnathambi
- Neurobiology Group, Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, 411008 Pune, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Sector 19, Kamla Nehru Nagar, Ghaziabad, UP, 201002, India.
| | - Udaya Kiran Marelli
- Central NMR Facility, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, 411008 Pune, India; Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, 411008 Pune, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Sector 19, Kamla Nehru Nagar, Ghaziabad, UP, 201002, India.
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2
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Liu H, Cui Y, Zhao X, Wei L, Wang X, Shen N, Odom T, Li X, Lawless W, Karunarathne K, Muschol M, Guida W, Cao C, Ye L, Cai J. Helical sulfonyl-γ-AApeptides modulating Aβ oligomerization and cytotoxicity by recognizing Aβ helix. Proc Natl Acad Sci U S A 2024; 121:e2311733121. [PMID: 38285951 PMCID: PMC10861862 DOI: 10.1073/pnas.2311733121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 12/10/2023] [Indexed: 01/31/2024] Open
Abstract
In contrast to prevalent strategies which make use of β-sheet mimetics to block Aβ fibrillar growth, in this study, we designed a series of sulfonyl-γ-AApeptide helices that targeted the crucial α-helix domain of Aβ13-26 and stabilized Aβ conformation to avoid forming the neurotoxic Aβ oligomeric β-sheets. Biophysical assays such as amyloid kinetics and TEM demonstrated that the Aβ oligomerization and fibrillation could be greatly prevented and even reversed in the presence of sulfonyl-γ-AApeptides in a sequence-specific and dose-dependent manner. The studies based on circular dichroism, Two-dimensional nuclear magnetic resonance spectroscopy (2D-NMR) spectra unambiguously suggested that the sulfonyl-γ-AApeptide Ab-6 could bind to the central region of Aβ42 and induce α-helix conformation in Aβ. Additionally, Electrospray ionisation-ion mobility spectrometry-mass spectrometry (ESI-IMS-MS) was employed to rule out a colloidal mechanism of inhibitor and clearly supported the capability of Ab-6 for inhibiting the formation of Aβ aggregated forms. Furthermore, Ab-6 could rescue neuroblastoma cells by eradicating Aβ-mediated cytotoxicity even in the presence of pre-formed Aβ aggregates. The confocal microscopy demonstrated that Ab-6 could still specifically bind Aβ42 and colocalize into mitochondria in the cellular environment, suggesting the rescue of cell viability might be due to the protection of mitochondrial function otherwise impaired by Aβ42 aggregation. Taken together, our studies indicated that sulfonyl-γ-AApeptides as helical peptidomimetics could direct Aβ into the off-pathway helical secondary structure, thereby preventing the formation of Aβ oligomerization, fibrillation and rescuing Aβ induced cell cytotoxicity.
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Affiliation(s)
- Heng Liu
- Department of Chemistry, University of South Florida, Tampa, FL33620
| | - Yunpeng Cui
- Department of Chemistry, University of South Florida, Tampa, FL33620
| | - Xue Zhao
- Department of Chemistry, University of South Florida, Tampa, FL33620
| | - Lulu Wei
- Department of Chemistry, University of South Florida, Tampa, FL33620
| | - Xudong Wang
- Department of Molecular Biosciences, University of South Florida, Tampa, FL33620
| | - Ning Shen
- Department of Chemistry, University of South Florida, Tampa, FL33620
| | - Timothy Odom
- Department of Chemistry, University of South Florida, Tampa, FL33620
| | - Xuming Li
- Department of Chemistry, University of South Florida, Tampa, FL33620
| | - William Lawless
- Department of Chemistry, University of South Florida, Tampa, FL33620
| | | | - Martin Muschol
- Department of Physics, University of South Florida, Tampa, FL33620
| | - Wayne Guida
- Department of Chemistry, University of South Florida, Tampa, FL33620
| | - Chuanhai Cao
- Taneja College of Pharmacy, University of South Florida, Tampa, FL33612
| | - Libin Ye
- Department of Molecular Biosciences, University of South Florida, Tampa, FL33620
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, Tampa, FL33620
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3
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Ishikawa S, Sakai T. One-Pot Approach to Synthesize Tough and Cell Adhesive Double-Network Hydrogels Consisting of Fully Synthetic Materials of Self-Assembling Peptide and Poly(ethylene glycol). ACS APPLIED BIO MATERIALS 2023; 6:5282-5289. [PMID: 37862142 DOI: 10.1021/acsabm.3c00562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2023]
Abstract
Hydrogels with a double network (DN) structure are compelling biomaterials, holding potential for use as artificial extracellular matrices. Generally, the DN approach imparts hydrogels with high mechanical strength and cell-adhesive properties. However, achieving this often demands a complex multistep process involving potentially hazardous free-radical polymerization, which can result in toxicity. This limits their broad biological applications. In this work, we introduce a straightforward yet biocompatible method to fabricate tough and cell-adhesive DN hydrogels using entirely synthetic materials: the self-assembling peptide (RADA16) and poly(ethylene glycol) (PEG). An in situ mixing of these components leads to the sequential formation of DN hydrogels─first through the self-assembly of the RADA16 peptide and then via chemical cross-linking between PEG molecules. Hydrogels produced this way exhibited up to a 10-fold increase in fracture energy, and cells seeded on their surfaces showcased good attachment. Our design underscores the efficacy of the DN approach and the promising applications of peptides in tissue engineering.
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Affiliation(s)
- Shohei Ishikawa
- Department of Chemistry & Biotechnology, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Takamasa Sakai
- Department of Chemistry & Biotechnology, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
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4
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Maity D. Inhibition of Amyloid Protein Aggregation Using Selected Peptidomimetics. ChemMedChem 2023; 18:e202200499. [PMID: 36317359 DOI: 10.1002/cmdc.202200499] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/28/2022] [Indexed: 11/24/2022]
Abstract
Aberrant protein aggregation leads to the formation of amyloid fibrils. This phenomenon is linked to the development of more than 40 irremediable diseases such as Alzheimer's disease, Parkinson's disease, type 2 diabetes, and cancer. Plenty of research efforts have been given to understanding the underlying mechanism of protein aggregation, associated toxicity, and the development of amyloid inhibitors. Recently, the peptidomimetic approach has emerged as a potential tool to modulate several protein-protein interactions (PPIs). In this review, we discussed selected peptidomimetic-based approaches for the modulation of important amyloid proteins (Islet Amyloid Polypeptide, Amyloid Beta, α-synuclein, mutant p53, and insulin) aggregation. This approach holds a powerful platform for creating an essential stepping stone for the vital development of anti-amyloid therapeutic agents.
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Affiliation(s)
- Debabrata Maity
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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5
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Maity D, Howarth M, Vogel MC, Magzoub M, Hamilton AD. Peptidomimetic-Based Vesicles Inhibit Amyloid-β Fibrillation and Attenuate Cytotoxicity. J Am Chem Soc 2021; 143:3086-3093. [PMID: 33600171 DOI: 10.1021/jacs.0c09967] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An interruption in Aβ homeostasis leads to the deposit of neurotoxic amyloid plaques and is associated with Alzheimer's disease. A supramolecular strategy based on the assembly of peptidomimetic agents into functional vesicles has been conceived for the simultaneous inhibition of Aβ42 fibrillation and expedited clearance of Aβ42 aggregates. Tris-pyrrolamide peptidomimetic, ADH-353, contains one hydrophobic N-butyl and two hydrophilic N-propylamine side chains and readily forms vesicles under physiological conditions. These vesicles completely rescue both mouse neuroblastoma N2a and human neuroblastoma SH-SY5Y cells from the cytotoxicity that follows from Aβ42 misfolding likely in mitochondria. Biophysical studies, including confocal imaging, demonstrate the biocompatibility and selectivity of the approach toward this aberrant protein assembly in cellular milieu.
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Affiliation(s)
- Debabrata Maity
- Department of Chemistry, New York University, New York, New York 10003, United States
| | - Madeline Howarth
- Biology Program, New York University Abu Dhabi, P.O. Box 129188, Saadiyat Island Campus, Abu Dhabi, United Arab Emirates
| | - Maria C Vogel
- Biology Program, New York University Abu Dhabi, P.O. Box 129188, Saadiyat Island Campus, Abu Dhabi, United Arab Emirates
| | - Mazin Magzoub
- Biology Program, New York University Abu Dhabi, P.O. Box 129188, Saadiyat Island Campus, Abu Dhabi, United Arab Emirates
| | - Andrew D Hamilton
- Department of Chemistry, New York University, New York, New York 10003, United States
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6
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Merritt HI, Sawyer N, Arora PS. Bent Into Shape: Folded Peptides to Mimic Protein Structure and Modulate Protein Function. Pept Sci (Hoboken) 2020; 112:e24145. [PMID: 33575525 PMCID: PMC7875438 DOI: 10.1002/pep2.24145] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Accepted: 12/11/2019] [Indexed: 12/16/2022]
Abstract
Protein secondary and tertiary structure mimics have served as model systems to probe biophysical parameters that guide protein folding and as attractive reagents to modulate protein interactions. Here we review contemporary methods to reproduce loop, helix, sheet and coiled-coil conformations in short peptides.
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Affiliation(s)
| | | | - Paramjit S. Arora
- Department of Chemistry New York University, New York, New York 10003, United States
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7
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Kumar S, Henning-Knechtel A, Magzoub M, Hamilton AD. Peptidomimetic-Based Multidomain Targeting Offers Critical Evaluation of Aβ Structure and Toxic Function. J Am Chem Soc 2018; 140:6562-6574. [PMID: 29648815 DOI: 10.1021/jacs.7b13401] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The prevailing hypothesis stipulates that the preamyloid oligomers of Aβ are the main culprits associated with the onset and progression of Alzheimer's disease (AD), which has prompted efforts to search for therapeutic agents with the ability to inhibit Aβ oligomerization and amyloidogenesis. However, clinical progress is impeded by the limited structural information about the neurotoxic oligomers. To address this issue, we have adopted a synthetic approach, where a library of oligopyridylamide-based small molecules was tested against various microscopic events implicated in the self-assembly of Aβ. Two oligopyridylamides bind to different domains of Aβ and affect distinct microscopic events in Aβ self-assembly. The study lays the foundations for a dual recognition strategy to simultaneously target different domains of Aβ for further improvement in antiamyloidogenic activity. The data demonstrate that one of the most effective oligopyridylamides forms a high affinity complex with Aβ, which sustains the compound's activity in cellular milieu. The oligopyridylamide was able to rescue cells when introduced 24 h after the incubation of Aβ. The rescue of Aβ toxicity is potentially a consequence of the colocalization of the oligopyridylamide with Aβ. The synthetic tools utilized here provide a straightforward strategic framework to identify a range of potent antagonists of Aβ-mediated toxic functions. This approach could be a powerful route to the design of candidate drugs for various amyloid diseases that have so far proven to be "untargetable".
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Affiliation(s)
- Sunil Kumar
- Department of Chemistry , New York University , New York , New York 10003 , United States
| | - Anja Henning-Knechtel
- Biology Program , New York University Abu Dhabi , P.O. Box 129188, Saadiyat Island Campus , Abu Dhabi , United Arab Emirates
| | - Mazin Magzoub
- Biology Program , New York University Abu Dhabi , P.O. Box 129188, Saadiyat Island Campus , Abu Dhabi , United Arab Emirates
| | - Andrew D Hamilton
- Department of Chemistry , New York University , New York , New York 10003 , United States
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8
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Kumar S, Henning-Knechtel A, Chehade I, Magzoub M, Hamilton AD. Foldamer-Mediated Structural Rearrangement Attenuates Aβ Oligomerization and Cytotoxicity. J Am Chem Soc 2017; 139:17098-17108. [PMID: 29058422 DOI: 10.1021/jacs.7b08259] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The conversion of the native random coil amyloid beta (Aβ) into amyloid fibers is thought to be a key event in the progression of Alzheimer's disease (AD). A significant body of evidence suggests that the highly dynamic Aβ oligomers are the main causal agent associated with the onset of AD. Among many potential therapeutic approaches, one is the modulation of Aβ conformation into off-pathway structures to avoid the formation of the putative neurotoxic Aβ oligomers. A library of oligoquinolines was screened to identify antagonists of Aβ oligomerization, amyloid formation, and cytotoxicity. A dianionic tetraquinoline, denoted as 5, was one of the most potent antagonists of Aβ fibrillation. Biophysical assays including amyloid kinetics, dot blot, ELISA, and TEM show that 5 effectively inhibits both Aβ oligomerization and fibrillation. The antagonist activity of 5 toward Aβ aggregation diminishes with sequence and positional changes in the surface functionalities. 5 binds to the central discordant α-helical region and induces a unique α-helical conformation in Aβ. Interestingly, 5 adjusts its conformation to optimize the antagonist activity against Aβ. 5 effectively rescues neuroblastoma cells from Aβ-mediated cytotoxicity and antagonizes fibrillation and cytotoxicity pathways of secondary nucleation induced by seeding. 5 is also equally effective in inhibiting preformed oligomer-mediated processes. Collectively, 5 induces strong secondary structure in Aβ and inhibits its functions including oligomerization, fibrillation, and cytotoxicity.
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Affiliation(s)
- Sunil Kumar
- Department of Chemistry, New York University , New York, New York 10003, United States
| | - Anja Henning-Knechtel
- Biology Program, Division of Science, New York University Abu Dhabi , Abu Dhabi, United Arab Emirates
| | - Ibrahim Chehade
- Biology Program, Division of Science, New York University Abu Dhabi , Abu Dhabi, United Arab Emirates
| | - Mazin Magzoub
- Biology Program, Division of Science, New York University Abu Dhabi , Abu Dhabi, United Arab Emirates
| | - Andrew D Hamilton
- Department of Chemistry, New York University , New York, New York 10003, United States
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9
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Song Y, Moore EG, Guo Y, Moore JS. Polymer–Peptide Conjugates Disassemble Amyloid β Fibrils in a Molecular-Weight Dependent Manner. J Am Chem Soc 2017; 139:4298-4301. [DOI: 10.1021/jacs.7b00289] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Yang Song
- Department
of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Edwin G. Moore
- Department
of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Yanshu Guo
- Department
of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Jeffrey S. Moore
- Department
of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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10
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Qiao Y, Zhang M, Liang Y, Zheng J, Liang G. A computational study of self-assembled hexapeptide inhibitors against amyloid-β (Aβ) aggregation. Phys Chem Chem Phys 2017; 19:155-166. [DOI: 10.1039/c6cp07341g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We explore the structure, dynamics, and interaction between 3 identified hexapeptides and different Aβ-derived fragments and an Aβ17–42 pentamer.
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Affiliation(s)
- Yuan Qiao
- Key Laboratory of Biorheological Science and Technology Ministry of Education
- Bioengineering college
- Chongqing University
- Chongqing 400044
- P. R. China
| | - Mingzhen Zhang
- Department of Chemical and Biomolecular Engineering
- The University of Akron
- Akron
- USA
| | - Ya'nan Liang
- Key Laboratory of Biorheological Science and Technology Ministry of Education
- Bioengineering college
- Chongqing University
- Chongqing 400044
- P. R. China
| | - Jie Zheng
- Department of Chemical and Biomolecular Engineering
- The University of Akron
- Akron
- USA
| | - Guizhao Liang
- Key Laboratory of Biorheological Science and Technology Ministry of Education
- Bioengineering college
- Chongqing University
- Chongqing 400044
- P. R. China
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11
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Inhibition of tau aggregation using a naturally-occurring cyclic peptide scaffold. Eur J Med Chem 2016; 109:342-9. [DOI: 10.1016/j.ejmech.2016.01.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 01/06/2016] [Accepted: 01/07/2016] [Indexed: 11/24/2022]
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12
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Zhu L, Song Y, Cheng PN, Moore JS. Molecular Design for Dual Modulation Effect of Amyloid Protein Aggregation. J Am Chem Soc 2015; 137:8062-8. [DOI: 10.1021/jacs.5b01651] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Lijuan Zhu
- Department of Chemistry and
Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Yang Song
- Department of Chemistry and
Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Pin-Nan Cheng
- Department of Chemistry and
Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Jeffrey S. Moore
- Department of Chemistry and
Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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13
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Chemerovski-Glikman M, Richman M, Rahimipour S. Structure-based study of antiamyloidogenic cyclic d,l-α-peptides. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.097] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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14
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Li M, Howson SE, Dong K, Gao N, Ren J, Scott P, Qu X. Chiral metallohelical complexes enantioselectively target amyloid β for treating Alzheimer's disease. J Am Chem Soc 2014; 136:11655-63. [PMID: 25062433 DOI: 10.1021/ja502789e] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Stereochemistry is a very important issue for the pharmaceutical industry and can determine drug efficacy. The design and synthesis of small molecules, especially chiral molecules, which selectively target and inhibit amyloid-β (Aβ) aggregation, represent valid therapeutic strategies for treatment of Alzheimer's disease (AD). Herein we report that two triple-helical dinuclear metallosupramolecular complexes can act as a novel class of chiral amyloid-β inhibitors. Through targeting α/β-discordant stretches at the early steps of aggregation, these metal complexes can enantioselectively inhibit Aβ aggregation, which is demonstrated using fluorescent living cell-based screening and multiple biophysical and biochemical approaches. To the best of our knowledge, this is the first report of enantioselective inhibition of Aβ aggregation. Intriguingly, as a promising candidate for AD treatment, the chiral metal complex can cross the blood-brain barrier and have superoxide dismutase activity. It is well-known that chiral discrimination is important for understanding chiral drug action. Generally, one enantiomer is pharmaceutically active while the other is inactive or exerts severe side effects. Chiral discrimination should be important for AD treatment. Our work provides new insights into chiral inhibition of Aβ aggregation and opens a new avenue for design and screening of chiral agents as Aβ inhibitors against AD.
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Affiliation(s)
- Meng Li
- Laboratory of Chemical Biology, Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , Changchun, Jilin 130022, China
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15
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Song Y, Cheng PN, Zhu L, Moore EG, Moore JS. Multivalent Macromolecules Redirect Nucleation-Dependent Fibrillar Assembly into Discrete Nanostructures. J Am Chem Soc 2014; 136:5233-6. [DOI: 10.1021/ja501102f] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Yang Song
- Department
of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Pin-Nan Cheng
- Department
of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Lijuan Zhu
- Department
of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Edwin G. Moore
- Department
of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Jeffrey S. Moore
- Department
of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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16
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Singleton ML, Castellucci N, Massip S, Kauffmann B, Ferrand Y, Huc I. Synthesis of 1,8-diazaanthracenes as building blocks for internally functionalized aromatic oligoamide foldamers. J Org Chem 2014; 79:2115-22. [PMID: 24506270 DOI: 10.1021/jo402852m] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The synthesis of a variety of 9-functionalized 1,8-diazaanthracene diesters and amino acids is described. Derivatization at the 9-position relies on facile reactions performed on the 9-chloro and 9-bromomethyl precursors. This has allowed the incorporation of nucleophilic or sensitive functional groups that otherwise cannot be incorporated under standard methods for synthesizing these compounds. Additionally, the synthesis of the protected amino acids via a high-yielding monosaponification and subsequent Curtius rearrangement has been accomplished on a multigram scale. These units, together with the functionalized derivatives, should prove to be useful monomers in the synthesis of aromatic oligoamide foldamers.
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Affiliation(s)
- Michael L Singleton
- University of Bordeaux, CBMN (UMR 5248), Institut Européen de Chimie Biologie, 2 rue Robert Escarpit, 33600 Pessac, France
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17
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Liu J, Wang W, Zhang Q, Zhang S, Yuan Z. Study on the Efficiency and Interaction Mechanism of a Decapeptide Inhibitor of β-Amyloid Aggregation. Biomacromolecules 2014; 15:931-9. [DOI: 10.1021/bm401795e] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jing Liu
- Key Laboratory
of Functional
Polymer Materials of Ministry of Education, and Institute of Polymer
Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Wei Wang
- Key Laboratory
of Functional
Polymer Materials of Ministry of Education, and Institute of Polymer
Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Qian Zhang
- Key Laboratory
of Functional
Polymer Materials of Ministry of Education, and Institute of Polymer
Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Saihui Zhang
- Key Laboratory
of Functional
Polymer Materials of Ministry of Education, and Institute of Polymer
Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Zhi Yuan
- Key Laboratory
of Functional
Polymer Materials of Ministry of Education, and Institute of Polymer
Chemistry, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
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18
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Luo J, Abrahams JP. Cyclic Peptides as Inhibitors of Amyloid Fibrillation. Chemistry 2014; 20:2410-9. [DOI: 10.1002/chem.201304253] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Indexed: 11/06/2022]
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Rapid Access to Multiple Classes of Peptidomimetics from Common γ-AApeptide Building Blocks. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301841] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Zhang X, Tian Y, Li Z, Tian X, Sun H, Liu H, Moore A, Ran C. Design and synthesis of curcumin analogues for in vivo fluorescence imaging and inhibiting copper-induced cross-linking of amyloid beta species in Alzheimer's disease. J Am Chem Soc 2013; 135:16397-409. [PMID: 24116384 DOI: 10.1021/ja405239v] [Citation(s) in RCA: 214] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this article, we first designed and synthesized curcumin-based near-infrared (NIR) fluorescence imaging probes for detecting both soluble and insoluble amyloid beta (Aβ) species and then an inhibitor that could attenuate cross-linking of Aβ induced by copper. According to our previous results and the possible structural stereohindrance compatibility of the Aβ peptide and the hydrophobic/hydrophilic property of the Aβ13-20 (HHQKLVFF) fragment, NIR imaging probe CRANAD-58 was designed and synthesized. As expected CRANAD-58 showed significant fluorescence property changes upon mixing with both soluble and insoluble Aβ species in vitro. In vivo NIR imaging revealed that CRANAD-58 was capable of differentiating transgenic and wild-type mice as young as 4 months old, the age that lacks apparently visible Aβ plaques and Aβ is likely in its soluble forms. According to our limited studies on the interaction mechanism between CRANAD-58 and Aβ, we also designed CRANAD-17 to attenuate the cross-linking of Aβ42 induced by copper. It is well-known that the coordination of copper with imidazoles on Histidine-13 and 14 (H13, H14) of Aβ peptides could initialize covalent cross-linking of Aβ. In CRANAD-17, a curcumin scaffold was used as an anchoring moiety to usher the designed compound to the vicinity of H13 and H14 of Aβ, and imidazole rings were incorporated to compete with H13/H14 for copper binding. The results of SDS-PAGE gel and Western blot indicated that CRANAD-17 was capable of inhibiting Aβ42 cross-linking induced by copper. This raises a potential for CRANAD-17 to be considered for AD therapy.
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Affiliation(s)
- Xueli Zhang
- Molecular Imaging Laboratory, MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School , Building 75, Charlestown, Massachusetts 02129, United States
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Wu H, Li Y, Bai G, Niu Y, Qiao Q, Tipton JD, Cao C, Cai J. γ-AApeptide-based small-molecule ligands that inhibit Aβ aggregation. Chem Commun (Camb) 2013; 50:5206-8. [PMID: 24158240 DOI: 10.1039/c3cc46685j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We report the design, synthesis, characterization and evaluation of a novel class of γ-AApeptide one-bead-one-compound (OBOC) library, from which a small γ-AApeptide was identified to effectively prevent and disassemble Aβ aggregation.
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Affiliation(s)
- Haifan Wu
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33620, USA.
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Abstract
Interactions among β-sheets occur widely in protein quaternary structure, protein-protein interaction, and protein aggregation and are central in Alzheimer's and other amyloid-related diseases. This Perspective looks at the structural biology of these important yet under-appreciated interactions from a supramolecular chemist's point of view. Common themes in the supramolecular interactions of β-sheets are identified and richly illustrated though examples from proteins, amyloids, and chemical model systems. β-Sheets interact through edge-to-edge hydrogen bonding to form extended layers and through face-to-face hydrophobic or van der Waals interactions to form layered sandwich-like structures. Side chains from adjacent layers can fit together through simple hydrophobic contacts or can participate in complementary interdigitation or knob-hole interactions. The layers can be aligned, offset, or rotated. The right-handed twist of β-sheets provides additional opportunities for stabilization of edge-to-edge contacts and rotated layered structures.
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Affiliation(s)
- Pin-Nan Cheng
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, USA
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